Docker Cheat Sheet

General Commands

# Start the docker daemon
docker -d

# Get help with Docker. Can also use –help on all subcommands
docker --help

# Display system-wide information
docker info

Images

Docker images are a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system libraries and settings

# Build an Image from a Dockerfile
docker build -t <image_name> 

# Build an Image from a Dockerfile without the cache
docker build -t <image_name> . –no-cache 

# List local images
docker images 

# Delete an Image
docker rmi <image_name> 

# Remove all unused images
docker image prune 

Docker Hub

Docker Hub is a service provided by Docker for finding and sharing container images with your team. Learn more and find images at https://hub.docker.com

# Login into Docker
docker login -u <username>

# Publish an image to Docker Hub
docker push <username>/<image_name>

# Search Hub for an image
docker search <image_name>

# Pull an image from a Docker Hub
docker pull <image_name>

Containers

A container is a runtime instance of a docker image. A container will always run the same, regardless of the infrastructure. Containers isolate software from its environment and ensure that it works uniformly despite differences for instance between development and staging.

# Create and run a container from an image, with a custom name:
docker run --name <container_name> <image_name>

# Run a container with and publish a container’s port(s) to the host.
docker run -p <host_port>:<container_port> <image_name>

# Run a container in the background
docker run -d <image_name>

# Start or stop an existing container:
docker start|stop <container_name> (or <container-id>)

# Remove a stopped container:
docker rm <container_name>

# Open a shell inside a running container:
docker exec -it <container_name> sh

# Fetch and follow the logs of a container:
docker logs -f <container_name>

# To inspect a running container:
docker inspect <container_name> (or <container_id>)

# To list currently running containers:
docker ps

# List all docker containers (running and stopped):
docker ps --all

# View resource usage stats
docker container stats

Source: https://docs.docker.com/get-started/docker_cheatsheet.pdf